We went on the “ Wetland Wildlife Cruise “ with Ooo Haa tours and travel , through our hotel .41/2 hours around the Santubong river mouth and the mangroves. 198 Rm , around £38 each and good value including pick up and return and a meal in the boat . Ben , our guide was very knowledgeable and helpful. Only 3 tourists in the boat , so it wasn’t crowded . We missed the dolphins and the crocs but did get great views of the Proboscis monkeys and fireflies .